Other than breaking up the inflamation/ irritation cycle (as you are already involved with doing), without knowing precisely how you aggravated that in the first place, suggestion for more specific use adjustment/ therapy will be inconclusive. Also, without a Dit Da practitioner's attention, a "sour spot" can linger for a year or more, if it does not actually develop into something chronic.
Some common martial artist's reasons for elbow trouble are:
-Punching with the elbows locked
-Training a lot of fast, snapping hand motion, without slow, smooth motion to balance it
-Not warming up the joints properly for speed training, especially in between power training sessions
-Allowing the elbows to be struck, twisted, or otherwise taken beyond range of motion during training
-Injuries not necessarily related to martial arts, such as taking a bad fall
-Overtraining
If you do not already know how that initially occurred, I recommend you review this list, see if there is anything else you can think of, and try to factor out that tendency from your movement.
In fact, you might want to just give fast snapping motion a break for a good long while. Focus your training on other areas, and practice anything requiring elbow usage in slow-motion, carefully building up your speed with proper form in months to come.
Also, a good bottle of Zheng Gu Shui (正骨水) can often help in settling down the inflammation cycle. The bottle comes in a little red-and-white cardboard box, and you can purchase it from (almost) any Chinese herbalist. If you want something that you can apply yourself, Zheng Gu Shui works more efficiently than (most) over-the-counter Dit Da Jau.
Best,
Michael
